Products

Momentive RTV31 Silicone Rubber Compound

  • Product code: RTV31
  • Manufacturer: Momentive
  • Package size: contact us for details
  • Shelf Life: contact us for details

ILTRUST™ RTV31, RTV60, and RTV88 are high-temperature, two-part silicone elastomers. These compounds come ready-to-use with a base compound and dibutyl tin dilaurate (DBT) as the standard curing agent.

While DBT is suitable for most applications, other catalysts are available to enable faster curing, deeper section curing, and automated mixing.

The primary difference between RTV31, RTV60, and RTV88 lies in their viscosity in the uncured state.

Key Features & Benefits

  • Variable work times and cure rates (adjustable with curing agent type and amount)
  • Room temperature cure
  • Solvent-free composition (no solvent odor)
  • Excellent adhesion (requires a primer)
  • Superior release properties
  • Wide temperature resistance
    • From -54°C (-65°F) to 260°C (500°F) continuously
    • Up to 316°C (600°F) for short periods

Uncured Properties

Property RTV31 RTV60 RTV88
Color Red Red Red
Consistency Pourable Spreadable Paste
Viscosity (cps) 25,000 47,000 880,000
Specific Gravity 1.42 1.48 1.47

Uncured Properties (with 0.5% DBT Curing Agent)

Property RTV31 RTV60 RTV88
Work Time @ 25°C (hrs) 2 2 0.75
Cure Time @ 25°C (hrs) 24 24 24

Cured Properties (0.5% DBT, 7 Days at 25°C, 50% RH)

Property RTV31 RTV60 RTV88
Hardness (Shore A) 54 57 58
Tensile Strength (psi) 870 990 830
Elongation (%) 170 120 120
Tear Strength (lb/in) 29 40 42
Shrinkage (%) 0.6 0.6 0.6

Electrical Properties

Property RTV31 RTV60 RTV88
Dielectric Strength (V/mil) 430 450 440
Dielectric Constant (1kHz) 4.4 4.0 4.3
Dissipation Factor (1kHz) 0.03 0.02 0.03
Volume Resistivity (Ω·cm) 1.6×10¹⁴ 4.4×10¹⁴ 2.8×10¹⁴

Thermal Properties

Property RTV31 RTV60 RTV88
Temperature Range (°C/°F) -54 to 260 (-65 to 500) Same Same
Thermal Conductivity (W/m·K) 0.31 0.31 0.31
Coefficient of Expansion (cm/cm·°C) 20×10⁻⁵ 20×10⁻⁵ 20×10⁻⁵
Specific Heat (cal/g·°C) 0.35 0.35 0.35

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FX244-1 A specialized two-part silicone rubber designed for creating high-precision molds. This material features a unique oil-bleeding property that creates a self-releasing surface, eliminating the need for external non-stick sprays during demolding.

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